## Problem 205 — rank:285

**Title:** Infection under-ascertainment

**Added binding assumptions (LaTeX):**

```latex
A likelihood-tolerance set is not automatically a confidence set; calibrate its threshold under the stated model or label the resulting interval a sensitivity range without coverage. Define pre-observation infections and the delay/prevalence boundary terms. Auxiliary prevalence identifies incidence only through its duration and detection kernel. Empty feasible sets signal model rejection and unbounded sets legitimately produce uninformative cumulative-infection bounds.
```

**Direct edits:** 0. **Fresh external checks:** None; supplied sources retained as provenance.